IRQ: a unique setting that requests service from the processor.
IRQ #
Common Use
I/O Address
IRQ 1
Keyboard
IRQ 2(9)
Video Card
IRQ 3
Com2, Com4
2F0 to 2FF
IRQ 4
Com1, Com3
3F0 to 3FF
IRQ 5
Available (Normally LPT2 or sound card )
IRQ 6
Floppy Disk Controller
IRQ 7
Parallel Port (LPT1)
IRQ 8
Real-time clock
IRQ 9
Redirected IRQ2
370 - 37F
IRQ 10
Available (maybe primary SCSI controller)
IRQ 11
Available (maybe secondary SCSI controller)
IRQ 12
PS/2 Mouse
IRQ 13
Math Coprocessor
IRQ 14
Primary Hard Disk Controller
IRQ 15
Available (maybe secondary hard disk controller)
